scholarly journals Effects of pesticides on a predatory bug, Nesidiocoris tenuis (Reuter), in Okayama Prefecture, Japan

2021 ◽  
Vol 63 (0) ◽  
pp. 53-58
Author(s):  
Yusuke Nishi ◽  
Hiroyuki Matsuoka ◽  
Yasunori Kuroyanagi ◽  
Kana Namba
Keyword(s):  
Nesidiocoris Tenuis ◽  
Okayama Prefecture

A NEUROEPIDEMIOLOGICAL STUDY OF CHILDHOOD EPILEPSY IN OKAYAMA PREFECTURE, JAPAN, BY THE NEWLY PROPOSED ILAE CLASSIFICATION IN 2001

2006 ◽  
Vol 37 (S 1) ◽  
Author(s):  
T Akiyama ◽  
K Kobayashi ◽  
T Ogino ◽  
H Yoshinaga ◽  
E Oka ◽  
...  
Keyword(s):  
Childhood Epilepsy ◽  
Okayama Prefecture ◽  
Ilae Classification

Szomolnokite and Mirabilite from Yanahara Mine, Okayama Prefecture

1958 ◽  
Vol 3 (5) ◽  
pp. 429-431
Author(s):  
Nagashi Ogushi ◽  
Akira Kato
Keyword(s):  
Okayama Prefecture

Seafloor environmental changes during the last 100 years resulting from reconstruction of the artificial lake in Kojima Bay, Okayama Prefecture

2012 ◽  
Vol 73 (3) ◽  
pp. 217-234 ◽  
Author(s):  
Atsuko AMANO ◽  
Guangzhe JIN ◽  
Shin-ichi ONODERA ◽  
Takaharu SATO ◽  
Yuta SHIMIZU ◽  
...  
Keyword(s):  
Environmental Changes ◽  
Artificial Lake ◽  
Okayama Prefecture

scholarly journals Effect of the native strain of the predator Nesidiocoris tenuis Reuter and the entomopathogenic fungi Beauveria bassiana and Lecanicillium muscarium against Bemisia tabaci (Genn.) under greenhouse conditions in Tunisia

2021 ◽  
Vol 31 (1) ◽  
Author(s):  
Besma Hamrouni Assadi ◽  
Sabrine Chouikhi ◽  
Refki Ettaib ◽  
Naima Boughalleb M’hamdi ◽  
Mohamed Sadok Belkadhi
Keyword(s):  
Beauveria Bassiana ◽  
Bemisia Tabaci ◽  
Entomopathogenic Fungi ◽  
Tobacco Plant ◽  
Economic Losses ◽  
Native Strain ◽  
Lecanicillium Muscarium ◽  
Southern Tunisia ◽  
Significant Efficacy ◽  
Nesidiocoris Tenuis

Abstract Background The misuse of chemical insecticides has developed the phenomenon of habituation in the whitefly Bemisia tabaci (Gennadius) causing enormous economic losses under geothermal greenhouses in southern Tunisia. Results In order to develop means of biological control appropriate to the conditions of southern Tunisia, the efficacy of the native strain of the predator Nesidiocoris tenuis Reuter (Hemiptera: Miridae) and two entomopathogenic fungi (EPF) Beauveria bassiana and Lecanicillium muscarium was tested against Bemisia tabaci (Gennadius). Indeed, the introduction of N. tenuis in doses of 1, 2, 3, or 4 nymphs per tobacco plant infested by the whitefly led to highly significant reduction in the population of B. tabaci, than the control devoid of predator. The efficacy of N. tenuis was very high against nymphs and adults of B. tabaci at all doses per plant with a rate of 98%. Likewise, B. bassiana and L. muscarium, compared to an untreated control, showed a very significant efficacy against larvae and adults of B. tabaci. In addition, the number of live nymphs of N. tenuis treated directly or introduced on nymphs of B. tabaci treated with the EPF remained relatively high, exceeding 24.8 nymphs per cage compared to the control (28.6). Conclusions It can be concluded that the native strain of N. tenuis and the EPF tested separately were effective against B. tabaci. Their combined use appears to be possible.

Distribution, abundance and natural enemies of the invasive tomato leafminer, Tuta absoluta (Meyrick) in Kenya

2021 ◽  
pp. 1-16
Author(s):  
G. Kinyanjui ◽  
F. M. Khamis ◽  
F. L. O. Ombura ◽  
E. U. Kenya ◽  
S. Ekesi ◽  
...  
Keyword(s):  
Natural Enemies ◽  
Sustainable Management ◽  
Management Strategies ◽  
Tuta Absoluta ◽  
Macrolophus Pygmaeus ◽  
Larval Parasitoids ◽  
Parasitism Rates ◽  
Nesidiocoris Tenuis ◽  
Sentinel Plants ◽  
Open Fields

Abstract Tuta absoluta (Meyrick) has become a serious menace to sustainable production of tomato in Kenya. A survey was conducted between April 2015 and June 2016 to determine its distribution, abundance, infestation, and damage levels on tomato, and associated natural enemies. Trap counts of T. absoluta moths were recorded in all surveyed 29 counties, which indicated its nationwide distribution irrespective of altitude. Tuta absoluta was present in both open fields and greenhouses. The highest moth/trap/day was 115.38 ± 15.90. Highest leaf infestation was 92.22% and the highest number of mines and larvae per leaf were 3.71 ± 0.28 and 2.16 ± 0.45, respectively. Trap captures in terms of moth/trap/day were linearly and positively related to leaf infestations in open fields (R2 = 0.81) and greenhouses (R2 = 0.61). Highest fruits’ infestation and damage were 60.00 and 59.61%, respectively, while the highest number of mines per fruit was 7.50 ± 0.50. Nesidiocoris tenuis (Reuter) and Macrolophus pygmaeus (Rambur) were identified as predators of T. absoluta larvae. Nine species of larval parasitoids were recovered from infested foliage, with a combined parasitism of 7.26 ± 0.65%. Hockeria species was the most dominant (31.25%) and accounted for 12.88 ± 1.47% parasitism. Two species of larval parasitoids, Hockeria and Necremnus were obtained from sentinel plants with an average parasitism of 1.13 ± 0.25. The overall abundance and parasitism rates of recovered natural enemies were low to effectively control the field populations of T. absoluta. These findings form the basis of researching and developing effective and sustainable management strategies for the pest.

Shimazakiite-4M and shimazakiite-4O, Ca2B2O5, two polytypes of a new mineral from Fuka, Okayama Prefecture, Japan

2013 ◽  
Vol 77 (1) ◽  
pp. 93-105 ◽  
Author(s):  
I. Kusachi ◽  
S. Kobayashi ◽  
Y. Takechi ◽  
Y. Nakamuta ◽  
T. Nagase ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Diffraction Pattern ◽  
Powder Diffraction ◽  
Refractive Indices ◽  
New Mineral ◽  
Calcium Borate ◽  
Crystalline Limestone ◽  
Okayama Prefecture

AbstractShimazakiite occurs as greyish white aggregates up to 3 mm in diameter. Two polytypes, shimazakiite-4M and shimazakiite-4O, have been identified, the former in nanometre-sized twin lamellae and the latter in micrometre-sized lamellae. Shimazakiite was discovered in an irregular vein in crystalline limestone near gehlenite-spurrite skarns at Fuka mine, Okayama Prefecture, Japan. Associated minerals include takedaite, sibirskite, olshanskyite, parasibirskite, nifontovite, calcite and an uncharacterized hydrous calcium borate. The mineral is biaxial (–), with the following refractive indices (at 589 nm): α = 1.586(2), β = 1.650(2), γ = 1.667(2) and 2Vcalc = 53º [shimazakiite-4M]; and α = 1.584(2), β = 1.648(2), γ = 1.670(2) and 2Vcalc = 54.88º [shimazakiite-4O]. Quantitative electronmicroprobe analyses (means of 28 and 25 determinations) gave the empirical formulae Ca2B1.92O4.76(OH)0.24 and Ca2B1.92O4.76(OH)0.24 for shimazakiite-4M and shimazakiite-4O, respectively. The crystal structure refinements: P21/c, a = 3.5485(12), b = 6.352(2), c = 19.254(6) Å , β = 92.393(13)°, V = 433.6(3) Å3 [for shimazakiite-4M]; and P212121, a = 3.55645(8), b = 6.35194(15), c = 19.2534(5) Å , V = 434.941(18) Å3[for shimazakiite-4O], converged into R1 indices of 0.1273 and 0.0142, respectively. The crystal structure of shimazakiite consists of a layer containing B2O5 units (two near-coplanar triangular corner-sharing BO3 groups) and 6- and 7-coordinate Ca atoms. Different sequences in the c direction of four layers are observed in the polytypes. The five strongest lines in the powder-diffraction pattern [listed as d in Å (I)(hkl)] are: 3.02(84)(022); 2.92(100)(10) 2.81(56)(104); 2.76(32)(113); 1.880(32)(11,12,126,118) [for shimazakiite-4M]; and 3.84(33)(014); 3.02(42)(022); 2.86(100)(104); 2.79(29)(113); 1.903(44)(126,118) [for shimazakiite-4O].

Flood risk assessment in vegetated lower Asahi River of Okayama Prefecture in Japan using airborne topo-bathymetric LiDAR and depth-averaged flow model

2021 ◽  
Author(s):  
Keisuke Yoshida ◽  
Kimihisa nagata ◽  
Shiro maeno ◽  
Koji mano ◽  
Satoshi nishiyama ◽  
...  
Keyword(s):  
Risk Assessment ◽  
Flood Risk ◽  
Flow Model ◽  
Flood Risk Assessment ◽  
Okayama Prefecture

scholarly journals Fedorovskite from the Fuka mine, Okayama Prefecture, Japan

2020 ◽  
Vol 115 (6) ◽  
pp. 479-484
Author(s):  
Shoichi KOBAYASHI ◽  
Fumiko HIGASHINO ◽  
Mitsuo TANABE ◽  
Shigetomo KISHI ◽  
Yoshinori ICHIHASHI ◽  
...  
Keyword(s):  
Okayama Prefecture

scholarly journals Kaersutite and pargasite in xenoliths included in monzodiorite at Fuka, Okayama Prefecture, Japan

2004 ◽  
Vol 33 (2) ◽  
pp. 46-50
Author(s):  
Akimasa OMAE ◽  
Isao KUSACHI ◽  
Shoichi KOBAYASHI
Keyword(s):  
Okayama Prefecture

scholarly journals An Epidemic of Swinepox in Okayama Prefecture

1988 ◽  
Vol 41 (12) ◽  
pp. 870-874
Author(s):  
MOTOAKI OUCHI ◽  
MITSUO FUJIWARA ◽  
YOSHIHIRO HATANO ◽  
MASAHIRO YAO ◽  
FUMIO UNO ◽  
...  
Keyword(s):  
Okayama Prefecture
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